I get the whole thing about not flipping the comb around and putting it back in the hive the wrong way around. The girls don't like it. Ok. Here's the question. Everyone suggests having two hives when a beek is starting so they have things to mix and match in case of shortages in one hive. So, say for example, I wanted to move a comb of brood from one TBH to the other for population or a comb of food? How do I know which side to put which way when I am switching between hives. Do I just keep the orientation from the hive it came from? Is this a stupid question? If the bees care about the orientation of combs from their own hive, do they care about others as well when introduced?

The thing about flipping combs is mostly that the shape of each comb is exactly matched to the one adjacent and the brood etc. is all arranged like they want and the comb faces rebuilt to match each other. No need to make them rearrange things every time you get in the hive without any reason. If you have a reason to move a comb, move it. The bees will adjust. If you don't have a reason, why make them work so hard?

I would imagine you simply want to avoid the combs touching when you move a frame to a new location. As was said earlier though, the bees will fix the wax/comb to fit their space. I'd just guess that whatever is in the cells that touch would be lost.